Table 2.
Mode of infant feeding at birth according to prepregnancy body mass index (BMI) class, among primiparous and multiparous women (n = 3,205)
| Maternal prepregnancy BMI class | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Underweight < 8.5 kg/m2 | Normal weight 18.5–24.9 kg/m2 | Overweight 25.0–29.9 kg/m2 | Obese ≥30.0 kg/m2 | ||||||
| % | n | % | n | % | n | % | n | p | |
| Primiparous | |||||||||
| Exclusive formula feeding | 33.7 | 35 | 24.6 | 233 | 23.0 | 49 | 25.7 | 32 | 0.03 |
| Formula + breastfeeding | 17.0 | 18 | 13.6 | 122 | 19.2 | 39 | 23.2 | 26 | |
| Exclusive breastfeeding | 49.3 | 53 | 61.8 | 562 | 57.8 | 128 | 51.1 | 61 | |
| Multiparous | |||||||||
| Exclusive formula feeding | 30.2 | 43 | 25.7 | 311 | 27.3 | 108 | 31.9 | 78 | <10−3 |
| Formula + breastfeeding | 14.5 | 19 | 11.4 | 130 | 16.2 | 53 | 24.8 | 41 | |
| Exclusive breastfeeding | 55.3 | 71 | 62.9 | 707 | 56.5 | 206 | 43.3 | 80 | |